The 2019 novel coronavirus (2019-nCoV), with a beginning stage in Wuhan (China), has spread quickly among people living in different nations and has affected more than 6 million lives. Researchers around the globe are trying to device a solution in the form of the vaccine but unfortunately, till date, there is no full-proof vaccine for 2019-nCoV. Most of the countries are adopting prolonged lockdown and social distancing strategies to counter this pandemic. Flying Ad-hoc Network (FANET) on the other hand, can provide several services such as the delivery of essential items, disinfecting common areas, surveillance, traffic monitoring, communication, temperature monitoring, etc. Availing such services using FANETs during Corona Virus Disease (COVID-19) outbreak is like a boon that can minimize the general problems of mankind to some extent during lockdowns. Nowadays, it is foremost required to deploy solutions that can automate the process of availing several services using FANETs and the same is attracting researchers in great demand. This paper has presented a brief survey of several applications of FANETs (especially UAVs and Drones) that can facilitate mankind in coping with the general problems during COVDI-19 outbreak and subsequent lockdowns. We hope that this survey has covered most of the applications of UAVs and can provide new insights into the research community.

The deadly nature and huge case fatality rate in COVID-19 is now established by figures that are coming out daily. Various trends and symptoms are being unfurled by the pandemic and researchers are constantly trying to study them. One of the trends that is solidly established is that comorbid patients with COVID-19 infection have higher chances of developing severe symptoms and needs critical care attention in order to overcome the disease. Dietary pattern was less talked about aspect of the health paradigm but it has great influence on the physical and mental wellbeing of the individual. The trends towards high fat, carbohydrate, sugar food is really worsening and can be an invitation to chronic and terminal diseases like diabetes, cancer, COPD and many more if not checked in time. Gut microbiota has a crucial role in maintaining the homeostasis of the immunity system. Difference of diet in developed and developing countries is reason for more case fatality rates in developed countries despite having better health infrastructure than their developing counterparts. Gut microbiota also differs in these two geographically different regions. Role of immunity boosting and building diet is immense in preventive as well as curative aspect of COVID-19. Various vitamins and probiotics have profound effects on innate immune response system of the body. Infodemic is also a parallel emergency that is essential to address as prescribed medications can prove very harmful. This article tries to take a holistic review of these aspects.

A primary concern in Mobile Ad Hoc Networks (MANETs) is security. Secret sharing is an effective way to distribute a secret among n parties, where each party holds one piece of the secret. A number of key management schemes have been proposed for MANETs. However the secret sharing to control key hierarchy needs larger message transmission costs in many techniques. Existing research in key management can only handle very limited number of nodes and are inefficient, insecure, or unreliable when the nodes increases. Here this study modifies Autonomous key management scheme is proposed to address both for security and efficiency for key management in Mobile Ad hoc Network (MANET). It also reduces communication and computational cost in Ad-Hoc Network and works for large number of nodes.